Switch stand lock



June 30, 1931. p, sw so 1,812,179

SWITCH STAND LOCK Filed Oct. 2:, 1950 appliedtheretogjj Y Pat ente d June30, 1931 swImqH @srhmg 145C 1 This inventionrelates to railway syvitch s'tand locks and in sorhere'speets is-an init pro'vement upon lny former invention vcovered by Patent-N 1,773,326 dated August 19th 1930; however;

' for-m of switch-,stand towhieh the present invention; is particularly z'tdtptecliri that; the head of'the 'finstant switch stand 'isfonly r0 ,t-atable in 'respectgto ogeni ngor closing the switoh; Whereas my 'sai'di 'former invention was 5 applied "to a stand in which "the head is 5 both frota tably and 'reoi'prooa hly mpvathle when the swith; 'i's -"operatedr The. arineipal .v objecjt is obviously that of r ducing-amen pr'aetieal, simple,j and ole p'enclzilolefl'oekin,g' in'eeh thism than jheretofore of-th novel. structure will ep'p'ea r in the fol lowing. description of; the intention."

Begum-gnaw j'to the accompanyingdrawings, wherein like reference chhrtioters indicate likeparts', 3

V Figure 1 s 2 top-plan iew or aloognmon switch stand, head fiwith imp'royeol' look Figure 2- is an enl trged siole elevation of sanle "showings the honsing of the loek' in seo- 12;; 1 t p 1 v *F1gure, 311s a somewhatreduced external fab perspe'etive View? of the as: assembled;

and

' Figure 41s anenlargerl perspective vi'eW'of I the operating portions of the lock mechanism. 1 represents "thehetcl '01": the now common railroacl'switch standeslli'secl upon main line tratiks', and through, which the square signal st xtends axi'ally', f carrying the op-o lever-being piyotzilly m ou'rltect'as at liwithln I the head; 1; it bei versed rhisedf' to slibstanti zilly horizontal position switchl a two-part; separable housing designdto he fixedupon the extension See .for exztnlple v I pleteassemhly after 'thetWo portions of the differing inrespec't to the k I housing are "co' peratiyeIy nited," they being Theloeking shaft-is composed of a unitary and-"other more specific edytantag'es 7, form throughout except'z'is to the ofi'set portionindicatecl at;12 which pr'oviol'es'fa'fora nk the slotted? laterally extending. po i'tj on '5v 6f; gs well known to those" before the head jl. be turnedjthithfioyrf the 1 locking rnechanism is mounted' within je o ha f eemi Thwmpk W11 performs f umtieethat when 111 '1 '7, rof which the projeotin'ghetse Portion forms *an' integral part, Whilefthe other or g hood""po rtion"of the oompartrnent is indi- 'cate'd at 9.7 The lock is only possible'of co'm held together y he final "Plait-ling: of the locking ,S e in pOsition the ewit I 1' e member, normally horizontally disposed Within thehousing, andhaying one extreme enfclas-at -10 journalled Within the ass'emhly wztllstoffthe;housing, and theoppositeefi larged inner extremityl'l also punished 1' Within the wztlls ofthe housing. Thatpor- 'tion'of thislockingfsheftinterrnediateofthe tWo hearings -,j1'1st desc ribecl*is somewhat novel in shape forfconyen'iences herelneftelf described, but 1t'1s generally re'c'talngula1" in i lmi arrying a spindle lgtherenpon forlthe I 15 in; the base 8 of the lockhonsinggandalso through a-si lnilar hole or opening 161thr0i1gh the upper faee of the extension 5 oftheswitchfl ,stanclahead 1. i n-clwith 'vvhi'chthe'openinggfi in the base 8 registers when-the hou'singis" in place upon the switch hea'clJlThe'hori -zontal portion or head 17 of the dog-whe in its lowermost position registers inter-me? cliate of the'upperf ree fend ofthe lever.3x and- 1 the rearrnost wallofitheopeninglor slotin' whic'h the lever iiis piyotellylim'ounted and to theieby'prevents thele er from heingraised nits pivotal s11pportfor theturning ofthe 1 switch; However. Whenfthedog llfis raised thrown to open position tor operatingv 7 the I 1 of the locking 7 throwingtheh llediera'nk arm 18 in clock- Wise direction as viewed fromthe side oppo-:.

0 V by the rotttt' onof the locking shhfil ft'i's free I from acting asraniobstrnctionflto the freeend j "oi the lever 3st that the samemaybereadily its lowermost position it prevents outward motion of the locking shaft by engaging the fixed pin 19 integral with the base 8 of the housing, and the ball 20 on the crank arm 18 provides the necessary gravity bias to hold the locking dog 14 in its levated position unless otherwise adjusted.

A novel feature of the peculiar construction of the locking dog is that its throat is cut away at 21 somewhat abnormally, and the back of the head as at 22 is similarly shaped so that before the housing is applied to the extension 5 of the switch stand head the dog may be placed through the hole 16 into the cut out or slotted portion of the extension and there held in any desired mannor from beneath the extension while the housing for the lock and the locking mechanism are applied, thus avoiding the necessity of removal of the switch lever 3, this being a decided advantage in the quick and economica-l installation of the look upon such switch stand heads.

Now the mechanism for control of the rotatable or rockable locking shaft within the lock housing issimilar in many respects to my former patent above cited; however, novel in others and deemed worthy of protection in this application, to wit: the innermost portion of the housing forming the chamber 7 has extending centrally and upwardly therefrom two spaced rectangularly shaped wall members 23, intermediate of which the locking dog 24E is pivotally mounted as at 25 and functions both in cooperation with the locking shaft and the key for the lock. That portion of the dog 24 to one side or forwardly of the pivotal connection 25 is generally L-shaped, having the depending head 26 formed integral therewith and which head at the time the mechanism is left in locked position extends downwardly as shown in dotted lines intermediate of the squared portion 27 of the locking shaft and the adjacent inner wall of the housing, the dog being shown in such position in both Figures 2 and a. This dog is also provided with a tail 28 with suitable means for securely retaining the expansive helical spring 29 between it and the upper wall of the inner portion of the housing so that the dog is normally held by the action of said spring in the position just described, and the limit of this engagement is determined. both by the contactof the upper side of the tail 28 with the inner roof wall of the outer portion of the housing and also by the stepped shoulder 31 formed on the side of the dog. Centrally and beneath the pivotal connection 25 of the dog is integrally formed the arcuately shaped closure member 32 for the key-hole, it being so designed as to free the key for entrance or withdrawal at any time the device is in locked position, but absolutely prevents with drawal of the key when in any other position.

It will be further noted that when the key is inserted as shown in the drawings and turned clockwise as viewed from the side through which the key is applied, it will raise the dog 24- and in the raised position the dog may be held by the key unattended if the latter is turned a full half turn so as to permit of the entire operation of unlocking and turning the switch being accomplished with one hand, for as the dog 2% is thus left in elevated position with the key in place, the same hand may be employed in throwing the crank arm 18 down to horizontal position which lifts the locking dog 14:, and the gravitating effect of the ball 20 on the lever 18 will retain the locking dog in elevated position and in said position of the dog 24 the lever 3 may be raised and the switch thrown. Or the dog 24- may be raised by the key in one hand until the locking shaft is rotatable when the dog may be allowed to snap back onto the shaft and there remain until the latter is reversely rotated to locked position, thereupon the dog 2 f will snap back by the action of tee spring 29 to its locked relation with the shaft,

fter which thekey may be removed, but at no time can the key be removed unless the switch is left in locked position.

It will be noted that when the gravity lever 18 is thrown so that the locking shaft is in unlocked position, the upward throw of the dog 14 will be limited by its pivotal end engaging the under side of the top of the innermost portion of the housing, and that when the locking shaft is rotated to its extreme opposite position the side of the squared portion of the shaft will engage a slightly protruding portion as indicated in dotted lines at 33, so that the action of the shaft is positively stopped in either direction.

Another novel feature of my present structure is that I have recessed the base 8 of the inner portion of the housing so that it overlaps the extension 5 upon the three exposed sides thereof in making a neat looking and strong asembly, and while I have shown the base 8 as applied to the extension 5 as by-the two tap screws or bolts 6, it will be noted that housing projections 80 are formed integral with the external portion 9 of the housing, so that when the latter is in place, access to these bolts as by a wrench or the like is impossible, thus further insuring against tampering.

The key for the lock is designated by the numeral 34, and may be of the conventional type, and to facilitate operation of the device by those unaccustomed to same, the words Lock and-Open appear on the top of the housing, with appropriate arrows adjacent same, indicating the position to which the balled crank arm is to be manually operated to accomplish such functioning of the lock. It will of course be understood that various means may be resorted to in attaching the lock to the switch stand, particularly when it is attached to a stand of a type other than here in described, and that various'othermodificw gravity and spring actuated pawl for normally holding said shaft against rotation.

tions may be resorted to without 'dep-arting from the spirit of the invention asdefined in the following claims. r i

Having thus described my invention, What I claim anddeslre to secure by Letters Pat-4 ent, is

1. A switch stand lock comprising a hOusing havinga key holetherein, a rotatable shaft mounted within said housing, alocking dog eccentrically mounted on said shaft, and a p 2. A switch stand lock comprising a 'hous I ing, a rotatable shaftmountedwithin said housing, a vertically movable locking dog eccentrically mounted on said shaft, and a pawl for normally holdingsaid shaft against rotation. j i I 3. A switch stand lock of-the'type described when the housing is'assembled. I

nermost portion of the housing to the head, and means whereby the outermost-portion of the housing renders said: bolts inaccessibl V 9. In combination a switch stand,headhav-.

an operating handle pivoted Within said slot, and a-reciprocal locking, dogwithin the slot cooperatively engageable with the handle in either of itsextreme positions. a i

10. In comblnatlon, a switch stand head-1 having an extension provided with y a slot therein, an operating handle pivotedwithin locking dog within theslot cooperatively en-.

treme positions.

p In testimony whereof I afliir my signature.

PETER SWANSON.

7 having a vertically reciprocable locking dog J and a rockable shaft for operating saiddog,

a the shaft;

of a key controlled dog for locking or unlocking the shaft, meanswhereby said latter-dog may or may not be left in inactive position in respect to the shaft, and means whereby the key can not be removed from the lock unless the locking dog is in its ultimate locked position.

4;: A switch stand lock comprising avertic'ally reciprocable locking dog,

a'rockable shaft'for operating said dog, a key controlled dogforlockin'g or unlockingthe shaft; and I means whereby said latter dog may o'r may not be left in inactive position in respect to 5. A switch stand lock comprisi-nga verv tically reoiprocable eccentrically .mounted ing dog, a rockable shaftfor operating said dog, a key controlled dog for locking or un lock 1n do g may ormay not be left inactive position in respect to the shaft. 7

6. The combination with a switch stand: head of the type described having a laterally a hole through the roof "of the slotted portion, of a lock having a vertically reciprocable handle within the slot,said dog being so. shaped as to readily enter said hole and per-' m1t of the lock being applied to the without-removing the handle. i

the shaft, and means whereby'saidlatter stand I 7. The combination with a rotatable switch stand head having an operating handle and A an extension thereupon torpivotally 'c'arr'y-v ing the operating handle, of a tw0-.part telescopic lock housing mountablejuponthe'extension and, overlappi g e p threes i a sides thereof. r I M .8. In combination a switch standhead, a

telescopic lock containing housing mountable upon the head, bolts for securely fixing the insaid extension, and. a ti ll reciprdcal.

gageable with the handle 1n elther of its exr is u 1 ing an extension provided with a slot therein, V A 

